In this study, to explore the effect of Co contents on the electroplated Fe–Co–Ni samples, three different Fe–Co₃₃–Ni₆₂, Fe–Co₄₃–Ni₅₃, and Fe–Co₆₁–Ni₃₆ samples were electrochemically grown from Plating Solutions (PSs) containing different amounts of Co ions on indium tin oxide substrates. Compositional analysis showed that an increase in the Co ion concentration in the PS gives rise to an increment in the weight fraction of Co in the sample. In all samples, the co–deposition characteristic was described as anomalous. The samples exhibited a predominant reflection from the (111) plane of the face–centered cubic structure. However, the Fe–Co₆₁–Ni₃₆ sample also had a weak reflection from the (100) plane of the hexagonal close–packed structure of Co. An enhancement in the Co contents caused a strong decrement in the crystallinity, resulting in a decrease in the size of the crystallites. The Fe–Co₃₃–Ni₆₂ sample exhibited a more compact surface structure comprising only cauliflower–like agglomerates, while the Fe–Co₄₃–Ni₅₃ and Fe–Co_61–Ni₃₆ samples had a surface structure consisting of both pyramidal particles and cauliflower–like agglomerates. The results also revealed that different Co contents play an important role in the surface roughness parameters. From the magnetic analysis of the samples, it was understood that the Fe–Co₆₁–Ni₃₆ sample has a higher coercive field and magnetic squareness ratio than the Fe–Co₄₃–Ni₅₃ and Fe–Co₃₃–Ni₆₂ samples. The differences observed in the magnetic characteristics of the samples were attributed to the changes revealed in their phase structure and surface roughness parameters. The obtained results are the basis for the fabrication of future magnetic devices.

This paper studies the influence of factors such as heating rate, atomic number, temperature, and annealing time on the structure and the crystallization process of NiAu alloy. Increasing the heating rate leads to the moving process from the crystalline state to the amorphous state; increasing the temperature (T) also leads to a changing process into the liquid state; when the atomic number (N), and t increase, it leads to an increased crystalline process. As a result, the dependence between size (l) and atomic number (N), the total energy of the system (E_tot) with N as l~N^−1/3, and −E_tot always creates a linear function of N, glass temperature (T_g) of the NiAu alloy, which is T_g = 600 K. During the study, the number of the structural units was determined by the Common Neighborhood Analysis (CNA) method, radial distribution function (RDF), size (l), and E_tot. The result shows that the influencing factors to the structure of NiAu alloy are considerable.

In this paper, the molecular dynamics (MD) method was used to study the influence of factors of bulk Cu material, such as the effect of the number of atoms (N) at temperature (T), T = 300 K, temperature T, and annealing time (t) with Cu₅₃₂₄ on the structure properties, phase transition, and glass temperature T_g of the bulk Cu material. The obtained results showed that the glass transition temperature (T_g) of the bulk Cu material was T_g = 652 K; the length of the link for Cu-Cu had a negligible change; r = 2.475 Å; and four types of structures, FCC, HCP, BCC, Amor, always existed. With increasing the temperature the FCC, HCP, and BCC decrease, and Amorphous (Amor) increases. With an increasing number of atoms and annealing time, the FCC, HCP, and BCC increased, and Amor decreased. The simulated results showed that there was a great influence of factors on the structure found the gradient change, phase transition, and successful determination of the glass temperature point above T_g of the bulk Cu material. On the basis of these results, essential support will be provided for future studies on mechanical, optical, and electronic properties.

In this paper, the study of the influence of the matrix structure (mxm) of thin-film, rotation angle (α), magnetic field (B), and size (D) of Fe₂O₃ nanoparticle on the magnetic characteristic quantities such as the magnetization oriented z-direction (M_zE), z-axis magnetization (M_z), total magnetization (M_tot), and total entropy (S_tot) of Fe₂O₃ nanocomposites by Monte-Carlo (MC) simulation method are studied. The applied MC Metropolis code achieves stability very quickly, so that after 30 Monte Carlo steps (MCs), the change of obtained results is negligible, but for certainty, 84 MCs have been performed. The obtained results show that when the mxm and α increase, the magnetic phase transition appears with a very small increase in temperature Néel (T_Ntot). When B and D increase, T_Ntot increases very strongly. The results also show that in Fe₂O₃ thin films, T_Ntot is always smaller than with Fe₂O₃ nano and Fe₂O₃ bulk. When the nanoparticle size is increased to nearly 12 nm, then T_Ntot = T = 300 K, and between TNtot and D, there is a linear relationship: T_Ntot = −440.6 + 83D. This is a very useful result that can be applied in magnetic devices and in biomedical applications.

In this research, we have explored the effect of Au:Cu ratio on the crystallographic and electronic structural properties, formation energies, and radial distribution function (RDF) of Au-Cu alloy materials via density functional calculations. The results show that Au-Cu alloy can be formed in any Au:Cu ratio from 3:1 to 1:3 with a similar possibility. The results also reveal that the lattice constants of both Au and Cu are affected by the LDA-PWC pseudo-field, which is in full agreement with the experimental findings. An increase in the concentration of Cu impurity in Au results in a decrement not only in the lattice constants of the crystal system but also in the total energy of the system (E_tot). However, an enhancement in the electron density is determined by increasing Cu impurity concentration in Au. The RDF results confirm the contraction of lattice constants and a structural change in Au-Cu from cubic to tetrahedral is found when the Au:Cu ratio is equal to 1:1. These findings revealed in this work are expected to contribute to future studies on electronic materials.

This study aims to study the effect of several structural factors, such as number of atoms (N), shell thickness (d), and temperature (T), on the structure of amorphous iron nanoparticle (amorphous nano‐Fe) by using the molecular dynamics (MD) method with Sutton–Chen (SC) dip interaction and free boundary conditions. The structural parameters of amorphous nano‐Fe include their size (D), energy (E), radial distribution function (RDF), coordination number (CN), and coordination number density (CN_d). The results show that the glass temperature (T_g) and the first peak position (r) of radial distribution function (RDF) have the values of T_g = 900 K and r = 2.55 Å, respectively. Furthermore, the values of parameters D and E are always proportional to N^−1/3 and N⁻¹, respectively. Regarding the effect of number of atoms, shell thickness, and the temperature on the structure of amorphous nano‐Fe, we found that the increase in atoms number leads to decrease in the RDF height and increase in the coordination number (CN). However, increasing temperature leads to decreasing the shell thickness of amorphous nano‐Fe.